In 1322 Edward II of England led the largest army yet assembled against Scotland — a campaign meant to finish Robert the Bruce for good, organized and commanded personally, worthy of his conquering father.
It reached Edinburgh Castle. Foragers were sent out to find food in the surrounding country. They came back with a single decrepit bull and an empty wagon.1
Dysentery swept the army. Edward retreated, and found northern England stripped barer than ever. Hunger and disease finished the remnants. The disaster triggered a rebellion among his own lords; he fled, was captured in 1327, and killed.1
The following year his son negotiated peace, granted Scotland its independence, and recognized Robert the Bruce as its rightful king.1
Robert Greene uses the twenty-year campaign as Strategy 10's clearest demonstration of a specific method: making every attack cost the attacker something.1
It could hardly have been worse. Edward I had battered Wales into submission, then turned on Scotland — besieging towns, razing communities that resisted, and publicly torturing and executing Scots who fought back, including William Wallace.1
Bruce alone eluded him, escaping to the remote north. So Edward captured his family and friends, killed the men, and imprisoned the women in cages.1
Bruce remained defiant, had himself crowned in 1306, and vowed to throw the English out. Edward I died in 1307 before finishing the job.1
His son inherited a secure island and had no particular appetite for war, but also no reason to worry. England was far wealthier. Its armies were well equipped, well fed, well paid and experienced — recent wars had made them the most feared fighters in Europe. The Scots' weapons and armor were primitive.1
Edward II could field a great army against Scotland at any moment. He felt confident he could handle Bruce.
He was not wrong about any of that, which is what makes the case instructive.
A few months into the new reign, Bruce took some English-held Scottish castles and burned them. When Edward sent forces against him, Bruce refused to fight and fled into the forest with his small army.1
Edward sent more men to secure his remaining strongholds and take revenge. And then Scots soldiers began raiding England — highly mobile pirates on horseback who devastated the northern English countryside, destroying crops and livestock.1
The English campaign became too costly and was called off.
Years later Edward tried again, penetrating further into Scotland. In response Scottish raiders rode south and wrecked still more English farms and property.1
And in Scotland itself, Bruce's army burned their own countrymen's crops, leaving the invaders nothing to eat.1
The English wore themselves out chasing an enemy that refused battle. Bivouacked at night they heard bagpipes and horns out in the dark, making sleep impossible. Hungry, tired and endlessly irritated, they retreated to northern England — and found their own land barren of crops and cattle.1
Morale collapsed. Nobody wanted to fight in Scotland anymore. One castle after another fell back into Scottish hands, and in 1314 the Scots finally met the English directly at Bannockburn and won.1
Greene's statement of the essence is worth taking exactly: when someone attacks or threatens you, you make it clear that he will suffer in return.1
He may be stronger. He may be able to win battles. You will make him pay for each victory.
The specific move is not to take him on directly — Bruce would have lost — but to hurt something he values, close to home. You make him understand that every time he bothers you, he can expect damage, even if on a smaller scale. And the only way to make you stop attacking him in your irritating fashion is for him to stop attacking you.1
Greene's image for it: you are like a wasp on his skin, and most people leave wasps alone.1
The detail worth dwelling on is that Bruce burned Scottish crops — his own country's food — to deny the English supply.
The deterrence was not free and it was not painless for the people he was defending. A strategy of making every English incursion unprofitable meant making Scotland itself unprofitable, repeatedly, for twenty years. Greene reports this without comment as part of the method.
Someone with more power than you has decided you're a convenient source of whatever they want — a bigger company taking your market position, a colleague who routes work to you and credit away, an institution that finds you easy to ignore.
Direct confrontation loses, and you know it. That's why the situation persists.
The Bruce method is to identify what they actually value that you can reach — not their core strength, which is defended, but something adjacent and expensive: a relationship, a timeline, a reputation with a specific audience, an assumption their plan depends on. Then make sure that every time they take from you, that thing suffers.
Two disciplines make it work. It has to be reliable rather than dramatic: the English didn't stop because of one raid, they stopped because the connection between invading and losing crops became certain. And it has to be proportionate enough that escalating against you costs them more than tolerating you would.
The honest part is the cost. Bruce burned his own fields. A tit-for-tat strategy against someone stronger means accepting real damage to yourself as the price of making yourself expensive, sustained over a period long enough for the other side to update. Twenty years, in his case. It is not a way of winning quickly, and its whole value is that the other party eventually concludes you're not worth the trouble.
The Wars of Scottish Independence, Bruce's guerrilla strategy, the scorched-earth practice, Bannockburn and Edward II's 1322 catastrophe are documented history. [POPULAR SOURCE] for Greene's framing.
Open tension: Greene tells this as a deterrence story with a clean causal arrow — Bruce made invasion expensive, so the English stopped invading. Edward II's fall also owed a great deal to domestic English politics: his relationships with favourites, his conflicts with his own barons, and a rebellion whose causes were substantially internal. Scotland's resistance contributed to that instability rather than being its sole cause, and the chapter's version compresses a complicated dynastic collapse into a single strategic lesson.
The tension the chapter doesn't raise at all: this method is only available to someone willing to impose severe costs on their own side. Bruce's scorched-earth policy starved Scottish farmers to deny English foragers. Greene presents "make every attack cost him" as a portable technique for daily life, and the historical case that demonstrates it depended on a level of sacrifice by non-combatants that has no equivalent in the workplace analogies the chapter invites.
Set this beside Stonewall Jackson in the Shenandoah, the preceding case in the same chapter, and the two deterrence strategies turn out to work by opposite means.
Jackson deterred through unreadability — nobody could establish his strength or intentions, so the Union hedged against everything. It worked in three months and it was a bluff.
Bruce deterred through perfect predictability — the English knew exactly what invading Scotland would produce, because it had produced the same thing every time. It took twenty years and it was not a bluff at all.
What the pairing produces: Greene lists these as two of five methods without noting that their mechanisms are contradictory. One conceals information; the other guarantees it. The variable that decides between them is time — uncertainty buys months and cannot be sustained, while reliable retaliation costs decades to establish and then holds indefinitely without further effort.
Psychology → Tit-for-Tat and the Conditions for Cooperation. Work on iterated games found that a simple reciprocal strategy — cooperate initially, then do whatever the other player did last — outperforms far more sophisticated approaches, and that its key properties are being nice, retaliatory, forgiving and above all clear.
The insight the pairing produces: Bruce's strategy is that algorithm executed at national scale over two decades, and clarity is what made it work. The English were never punished for restraint and were always punished for aggression, with no exceptions and no ambiguity, which is precisely what allows an opponent to learn the rule. A retaliation that is occasional or unpredictable teaches nothing; the deterrent value lives entirely in the reliability.
Business → Making Yourself Expensive to a Larger Competitor. Smaller firms sometimes deter larger ones not by competing head-on but by ensuring that any incursion into their territory triggers a disproportionate and reliable response — aggressive pricing in the aggressor's most profitable segment, targeted poaching, public disputes that cost attention.
The insight: this only functions if the response is aimed at something the larger party values more than the territory in question, which is Greene's "hurt something close to home." A response aimed at the contested market itself is just competition and the bigger party wins it. The Scots didn't defend Scottish castles; they burned English farms, which Edward valued more than the castles and could not protect while invading.
The English never lost a battle they chose to fight, and they lost the war. Bruce's method required no victories — it required only that the arithmetic of invading Scotland come out negative, every single time, until an army that could beat him decided he wasn't worth beating.